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My boiler lights up,stays on for 1 minute then cutts out...

My boiler Heatline Vizo24 lights up,stays on for 1 minute then cutts out for few minutes and so on. some radiators remain cold,others are luke warm and the water is luke warm too. the system has been cleaned with x400 twice in last 2 months. while its lit, the red lights all light up in turn and when it gets to end, lights go out one by one until it gets to ''Bar pressure'' light and then it cuts out.Pressure display shows no drops.
Many Thanks
Regards
Zel
Doncaster
zel@cashrecycler.co.uk

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You could check the flame sensor is clean and the connections are tight . check the pressure switch as well. also get the over heat could be shutting off too soon ,

Check the rads for air lock ,

Posted on May 12, 2017

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the problem there a relay stuck or thermostat bring on the pump & you can lower your high limit aquastat!! also the flow valves can bypass hot hot water risers time to put in a seperate water heater domestic coil are not energy efficient !!!! aquastat high limit set @ 180f deg low limit set @ 140f deg!!!
good luck!!! tim

Posted on Oct 18, 2008

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SOURCE: gas central heating boiler. insuffient water pressure.

u need to have a key (its like a T shape key) and u put that under the boiler its a hole in there, than u open the tap which is near this hole.

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electric boiler- or other ?

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SOURCE: heating pressure gauge goes up

yes tami
there should be a pressure rellief valve fitted.
it also sounds like the heat exchanger is blocked if the hot water is not as good as it used to be and the boiler reaches temperature too quickly then there is scale in the heat exchanger and needs to be cleaned or replaced

Posted on Mar 30, 2009

  • 30 Answers

SOURCE: hot water

there are two main faults with combi boilers not giving hot water. one is a faulty flow sensor, the other is the most common which is a blocked heat exchanger caused by debris and scale in the system. this needs to be flushed out or may require a new heat exchanger depending on the age and condition of the boiler some plumbers may suggest a new boiler.

Posted on Mar 30, 2009

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